Shaykh Ibraheem Aar-Ruhaylee said, “…Innovations in Shaban:
First: The One Thousand Prayer
This is one of the innovations performed on the night of mid-Sha’ban. It is one hundred Rak’ah prayed in congregation. The Imaam recites Soorah al-Ikhlaas ten times in every Rak’ah. Alternatively, he prays ten Rak’ah and in every Rak’ah he recites Soorah al-Ikhlaas a hundred times after Soorah al-Faatihah. It is a rejected innovation.
Ibn Taymiyyah said, “As for the Marfoo’ narration regarding the ‘One Thousand’ Prayer, it is a lie and fabrication in agreement with the scholars of Knowledge and Hadeeth.” 
Ibn al-Qayyim said, “It is astonishing that some of the people of who have a sense of knowledge regarding the Sunan are deceived by this trivial action and pray it.” 
Second: Specifying the night of Mid-Sha’baan for prayer, and the day for fasting.
This is based on the narration: “When it is the night of mid-Sha’ban, then spend its night praying and its day fasting.”
This narration has no basis; only the established [authentic] narrations should be implemented and acted upon.
Staying awake during the night is therefore an innovation. As for fasting mid-Sha’ban, if it is with the intention of specifying this day, then it is an innovation. But if it coincides with a person fasting the days of the full moon (i.e. 13th, 14th and 15th), so a person fasts the 15th and the two days before it, then this is a Sunnah which has been proven by authentic ahadeeth. However, it is important to note that this is a practice for every Islamic month, not specifically Sha’ban.
Third: Praying six Rak’ah in the night of Mid-Sha’ban with the intention that it wards off calamities and gives a long life.
They are prayed along with the recitation of Soorah Yaaseen and Du’aa. This is also an innovation for which there is no evidence from the Sharee’ah. In fact, the scholars gave clearly mentioned it is an innovation.
Imaam an-Nawawi (may Allaah have mercy upon him) said, “The prayer known as Salaat ar-Raghaaib is 12 units of Prayer between Maghrib and Ishaa, in the night of the first Friday of Rajab; and also 100 units of prayer on night of mid-Sha’ban – both these prayers are rejected despised innovations. A person should not be deceived by them being mentioned in the book Qoot al-Quloob and also Ihyaa Uloom ad-Deen and neither any narration mentioning them.
This is because everything [which has been narrated regarding it] is false. A person should not be deceived by some of the Imaams who are confused regarding its ruling, even if they wrote a few papers stating that it is recommended, indeed such as person is mistaken.” 
 Ibn Taymiyyah; Iqtidhaa as-Siraat al-Mustiqeem
 Ibn al-Qayyim ; Al-Manaar Al-Muneef
 An-Nawawi; al-Majmoo; Sharh al-Muhadhab
Posted by Abdul Kareem Ibn Ozzie